高压段含有颗粒的含灰气体激波管流动数值模拟

Numerical Simulation of Flow in a Shock Tube with Dust in the High Pressure Section

本文给出了用类特征线法计算的高压室含灰的无限长激波管非平衡流动解。以膜压比ｐ４１＝５．０、高压室含灰的体积分数α４＝０．０１为例，详细分析了非平衡流场，并同冻结流解和平衡流解作了详细的对比分析，清楚地显示了含灰气体激波管非平衡流动从冻结流向平衡流过渡的各种细节，说明了基于冻结声速的非平衡流类特征线法计算何以能得到无限趋近于平衡流解的原因。本文的结果表明，类特征线方法可以提供非常精细的气－固二相流非平衡流场结构。

The nonequilibrium flow field in an infinitely long shocktube with dust in the high pressure section has been computed by aqnasi-characteristic method in this paper.As an exmaple,the solutionwith pressure ratio p_41 =5 and particle volume fraction in the high pres-sure section α_4=0.01 has been presented here. The nonequilibrium solutionhas been analyzed comprehensively and compared with the frozen solutionand the equilibrium solution. By this way,the details of the transitionfrom frozen to equilibrium of a nonequilibrium flow in a dust-gas shocktube have been clearly shown,and the reason that a nonequilibrium flowcalculation using the characteristic method based on frozen sound speedcan obtain a solution infinitely approching the equilibrium solution is ex-plained.The result shows that the quasi-characteristic method can give avery fine structure of the gas-particle flow field.